Machining With The Counterspindle - Siemens SINUMERIK 840D sl Operation/Programming Manual

08/2005
5
5.9

Machining with the counterspindle

Work offsets
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
5.9 Machining with the counterspindle
Enter the names of the start and end markers and the number of
times the blocks are to be repeated.
Press the "Accept" softkey.
The marked program blocks are repeated.
If your turning machine has a counterspindle, you can machine
workpieces using turning, drilling and milling functions on the front and
rear faces without reclamping the workpiece manually.
Before machining commences on the rear face, the counterspindle
must grip the workpiece, remove it from the main spindle and move it
to the new machining position. You can program these operations with
the "Counterspindle" function.
ShopTurn offers the following five programming steps:

Gripping: Gripping the workpiece with the counterspindle (with limit
stop if necessary)

Pulling: Pulling the workpiece out of the main spindle with the
counterspindle

Rear side: Moving the workpiece with the counterspindle to the
new machining position

Complete: Gripping, pulling (optionally with parting) and rear face
steps

Front face: Work offset for machining the next front face (for bars)
If you start to execute a program containing a counterspindle
machining operation, the counterspindle is first retracted to the return
position defined in a machine data code.
Please also refer to the machine manufacturer's instructions.
In the case of the "Pulling" and "Rear face" functions, you must specify
in which work offset ShopTurn should save the shifted coordinate
system; you do not have to specify these work offsets beforehand.
In the case of the "Front face" function, however, you must specify the
work offset that you want to use.
To simplify the programming process, programming suggestions for
three typical applications are provided below:

Machine main spindle – Transfer workpiece – Machine
counterspindle

Machine counterspindle (without first transferring workpiece)

Machine bars
ShopTurn Functions
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